in the 19th century, became extensive, especially during the nickel boom of 1965-75, and has generated vast quantities of waste material ranging from boulders down to lateritic clay, much of which has spilled down hillsides into valleys. River channels
each of the river mouths. Reference is made to recent attempts to reduce the dispersal of mining waste, and to manage the mining lanscape in a way that is less destructive to surface stability, soils and vegetation. (E.C.F. BIRD).